Removed the incorrect version of UltiSnips.
Added the correct fork of UltiSnips.
Removed stale version of Supertab.
Added most current fork of Supertab.
*sigh* had Supertab in the wrong place.
OK, let's see if I can get Supertab in the right place.
Switching around forks of UltiSnips yet again.

MarcWeber interops the best with snipMate.
Switched to MarcWeber/ultisnips.
Back to main SirVer/ultisnips -- faster & better.
Back to SirVer/ultisnips.